System and Method for Point of Sale Transaction Logging

3. The system of claim 1, wherein the product information comprises at least one of product price, location of sale, and time of sale.

4. The system of claim 1, wherein the product information includes a price for the product, the price for the product being determined based on a price total received from a payment processing system, the payment processing system processing a payment for the purchase transaction, the price total being associated with the payment for the purchase transaction.

5. The system of claim 1, wherein at least one of the backend system or the logger device is configured to estimate a product inventory at the retail location based at least in part on the transaction data.

6. The system of claim 1, wherein the transaction data is not actively transmitted to the point of sale system by the logger device.

7. The system of claim 1, wherein a search engine is configured to accept queries for retail products and provide search results including the online listing when the queries include at least some of the product information for the product.

8. The system of claim 1, wherein the logger device is configured to augment the transaction data to produce augmented point of sale data and to transmit the augmented point of sale data to the point of sale system.

11. The system of claim 1, wherein the backend system is further configured to update the items for sale with other products purchased from the retail location by other customers.

12. The system of claim 1, wherein the online listing includes a map section showing a location of the retail location having the product.

15. The method of claim 13, wherein the product information comprises at least one of product price, location of sale, and time of sale.

16. The method of claim 13, wherein the product information includes a price for the product, the price for the product being determined based on a price total received from a payment processing system and the transaction data, the payment processing system processing a payment for the purchase transaction, the price total being associated with the payment for the purchase transaction.

17. The method of claim 13, further comprising estimating, by the backend system, a product inventory at the retail location based at least in part on the transaction data.

18. The method of claim 13, wherein the transaction data is not actively transmitted to the point of sale system by the logger device.

20. The method of claim 13, further comprising updating, by the backend system, the items for sale with further products purchased from the retail location by other customers.